Which quadrilateral has diagonals that are both congruent and perpendicular?

Find the balance at the end of 4 years if 1000 is deposited at the rate of

Solve with work both bert and ernie received an increase in their weekly salaries. bert's salary increased from $520 to $520. ernie's salary went from $580 to $645. find the percent of increase for each salary. what was the larger of the two percents ?

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)